The Celtics have agreed to a blockbuster trade involving the No. 1 overall pick in next week's draft, multiple reports said Saturday.

According to ESPN, the team will trade the pick to the Philadelphia 76ers in exchange for the No. 3 pick, a 2018 first-round pick Philadelphia previously acquired in a separate deal and another future first-round pick.

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The protections on those future first-round picks are not known, the report said.

The trade will likely be finalized Monday, the report said.

ESPN reported the 76ers will draft top college prospect Markelle Fultz, a guard.